Center-bearing for car-trucks.



' J. J. SKAHEN` GEN-TER BEARING FOR GAR TRUGKS.

APPLICATION FILED PEB. 1s, 190s.

905,754 Patented Dec. 1,1908.

` lll IIII `UNITED STATES PATENT JAMES J. sienten, or Burrito, N

MENTS, or Tnirrrr-Fivn ort-nt" vv voer, assioma, in' merci A.Nninsarn ASSIGN- ;\:ntrcnrits 'ro Joi-iiv E. SHEHAX, EIGHT ONE-HUN- DREDTHS TO GEORGE ll.. CHARNCCK, A N l) TWO CXE-HXDl-LLDTHS TO MORE IS A.' GRIFFIN,

ALL OF BUFFALO, NEW YORK.

CENTER-BEARING FORv CAR-TRUCKS.

Specification of Letters Patent.

Patented Dsc. 1, 19t

Application filed February 13, 1908. Serial No. 455,675).

citizen of the United States, residing at Buii'alo, in the county ot lfjrieand State of New York, have invented. a new and useful Ii'iiprovenient in Center-Bearings for Car* Trucks, ot which the iollowing is a speciiication.

This invention relates to the center bearings or plates interposed between the body and the trucks or railway cars, and more particularly street. railway I 'ars'.

Cnc ot the objects ot my invention 4is the construction of an Vclaw-lent. bearing of this kind which provides a comparatively large lubricant chamber' and in which the contact area and consei'pient friction of the parts is reduced to a minimum.

A further object is to so construct the bearing that the part receiving the greatest wear can be readily replaced by a new one without requiring tht renewal of the entire bearing. y

An additional object is to render the bearing as dust-proot as possible and provide means for the collection of any dust or grit that may enter between the bearing surfaces, so as to lengthen the lii'e ot the bearing.

Inv the accompanying drau-'ingsz-Figure l is an inverted or bottoni plan View of the upper plate of the center-bcaring- Fig. 2 is a top plan view of its lower plate. Fig. 3 is a vertical central section of the assembled bearing and the body-bolster and truckbolster.

Similar letters of reference indicate corresponding parts in the several views.

A indicates the body-bolstcr of a railway v car and B the truck-bolster.

40 C indicates the upper or body plate ot .the center bearing, D the lower or truck plate and E the usual king-bolt or pin passing centrally through said plates and the body and truck-holsters. These plates are secured to said holsters by bolts o and (Z re spectively, or other suitable means, and the two plates are preferably provided at their front and rear edges with stop-flanges or shoulders o1 and (Z1, respectively, whichvbear against the adjacent sides of the body and truck holsters and resist 'twisting of tte plates thereon, thereby relievingilie bolts c, @Z from undue strains.

The lower bearing plate l.) is'provided centrally with `a coniparatively large lstud f' of cylii'idrical forni, and around this stud with an upvvardly-projecting annular rim or llangc g which is separated from the stud by a conil'iaratively wide and deep annular lgroove or socket /i adapted .to receive a quantity oi' suitable lubricant. such as heavy oil or grease. Surrounding said stud and resting upon the bottom of said groove is a removable wear ring l of hardened steel or other suitable materia. This ring is narrowerh than the groove so as to `leave a grit and dust-receiving space or auxiliary groove between one edge oi the ring, preferably its outer edge, and the outer wall of the groove, as shown at j, in Fig. 3. The wear ring is held from rotation by stop-pins z' passing through it and entering holes in the body of the lower bearing plate D. p

The upper bearing plate C is provided at its edge with a depending annular liange or guard which preferably overlaps the rim g of the lower hearing plate and serves to exclude dust and grit from the bearing. Inside of this dust-guard the upper plate is provided with a depending hub 'Z which surrounds the stud j' of the lower bearing-plate D and rests at its lower edge upon the wear ring I. The diameter of this. hub is considerably less than the width 4of the lubricant-groove la, so as to leave an ample space for the lubricant betweenthe outer side of the hub and the rim g, as shown in Fig. 3. A' small clearance, say ot' an eighth of an inch, is preferably ,left between the hub Z and the stud f to allow the upper plate C to rock or tilt-to a limited extent on the lower plate in ,following the rocking or tilting movements of the -ar body,- and also to avoid frictionbetween theseA parts. Clearance is also provided for between the upper end ot' said stud and the body-bolster to avoid friction atthis point.

By this improved.construction, while providing a sufficiently large lubricant chamber to keep the bearing oiled for a comparatively long period, the friction is reduced to a minimum, inasmuch as the wearing surfaces are practically confinedto the bottom of the hub Z and the upper side of'the wear-ring.

Asthe ring is separate and removable from the lower plate D, 1t can be renewed when .ring` l were cast integral with the plate D.

l claim as my invention :F

l. A center bearing forear trucks, com-f prising an upper plate and a lower plate, the

lower plate havinga vertical stud and araised rim surrounding the stud and separated therefrom by an intervening lubricant groove, and the 'upper plate having` a de- ],iending hub surrounding `said stud and eX-I tending into saidgroove, said hub being considerably 'smaller in diameter than the orner wall of the groove, leaving a lubricant space between Said parts, substantially as set forth.

2. A center bearing for car trucks, comprisinp` a lower plate having' a vertical stud and a raised .rim Surrounding the stud vand separated therel'r'o by an inrervening lubriantgroove, a removable wear-ring seated in said groove, and an upper plate having` a depending hub Aeuri'ounding said stud and reelingl upon said wear-ring, substantially as set -forth.

3. A center bearing for car trucks, comprising a lower plate havinga vertical stud and a raieed rim surrounding the Stud and separated therefrom by an intervening lubricant groove, a removable wear-ring seated in raid groove means for holding said ring 'from rotation id an upper plate having a depending hun Surrounding said stud and resting;1 upon said wear-ring, substantially as set forth.

Li. A center bearing' car trucks, comprieing a lower plate having a vertical stud and a raised rim Surrounding the stud and separated therefrom by an intervening lubricant groove, a removable wear-ring seated 1n said groove, and an upper plate having eoeyma a depending hub Surrounding said stud and resting,- uponsaid wear-ring', said hub being considerably smaller in diameter than the outer wall of said groove, :leaving a lubricant space between said parts,nsubstantially as set forth.

5. A center bearing forffcar trucks, coniprising a lower plate having a. vertical studv and a raised rim surrounding the stud and separated therefrom by an intervening lubricant groove, a removable wear-ring seated in said groove, and an upper plate having a depending hub surrounding said stud and resting upon said Wear-ring, the thickness of said hub. being considerably less than the width of said groove and the inner and outer surfaces of the hub being'separated from said stud and said rim by intervening spaces, substantially as set forth.

G. A center bearing for cartrucls, comprising an upper plate and a lower plate, the lower plate having a vertical vstud and a raised rim surrounding the stud and separated theretrom byv an intervening lubricant groovesaid groove being provided in its bottom with an auxiliary dustreceivinggroove, and the upper plate having 'a de pending hub surrounding said stud and extending into said main lgroove, substantially as set forthi 7. A center bearing for ear trucks, come' prising a lower plate having a vertical stud and a raised rim surrounding the Stadland separated therefrom by an intervening lu bricant groove, a. removable wear-ring seated in said groove and narrower than the saine, leaving an auxiliary dust-receiving' `groove between the edge ot the ring and one of the walls o' said main groove, `and an upper plate having a depending hub surrounding Said stud and resting upon Said wear-ring, substantially as set forth.

Vitness my hand this 8th day of February, 1908.

J AMES J. SKAHEN.

'Witnesses Grenen Cir-limoen, C. F. Garne. 

